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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qglobal.h"
#include "qlibrary.h"
#include "qdebug.h"
#include "unicode/uversion.h"
#include "unicode/ucol.h"
QT_BEGIN_NAMESPACE
typedef UCollator *(*Ptr_ucol_open)(const char *loc, UErrorCode *status);
typedef void (*Ptr_ucol_close)(UCollator *coll);
typedef UCollationResult (*Ptr_ucol_strcoll)(const UCollator *coll, const UChar *source, int32_t sourceLength, const UChar *target, int32_t targetLength);
typedef int32_t (*Ptr_u_strToCase)(UChar *dest, int32_t destCapacity, const UChar *src, int32_t srcLength, const char *locale, UErrorCode *pErrorCode);
static Ptr_ucol_open ptr_ucol_open = 0;
static Ptr_ucol_strcoll ptr_ucol_strcoll = 0;
static Ptr_ucol_close ptr_ucol_close = 0;
static Ptr_u_strToCase ptr_u_strToUpper = 0;
static Ptr_u_strToCase ptr_u_strToLower = 0;
enum LibLoadStatus
{
ErrorLoading = -1,
NotLoaded = 0,
Loaded = 1
};
static LibLoadStatus status = NotLoaded;
static UCollator *icuCollator = 0;
#define STRINGIFY2(x) #x
#define STRINGIFY(x) STRINGIFY2(x)
bool qt_initIcu(const QString &localeString)
{
if (status == ErrorLoading)
return false;
if (status == NotLoaded) {
// resolve libicui18n
QLibrary lib(QLatin1String("icui18n"), QLatin1String(U_ICU_VERSION_SHORT));
if (!lib.load()) {
qWarning() << "Unable to load library icui18n" << lib.errorString();
status = ErrorLoading;
return false;
}
ptr_ucol_open = (Ptr_ucol_open)lib.resolve("ucol_open");
ptr_ucol_close = (Ptr_ucol_close)lib.resolve("ucol_close");
ptr_ucol_strcoll = (Ptr_ucol_strcoll)lib.resolve("ucol_strcoll");
if (!ptr_ucol_open || !ptr_ucol_close || !ptr_ucol_strcoll) {
// try again with decorated symbol names
ptr_ucol_open = (Ptr_ucol_open)lib.resolve("ucol_open" STRINGIFY(U_ICU_VERSION_SUFFIX));
ptr_ucol_close = (Ptr_ucol_close)lib.resolve("ucol_close" STRINGIFY(U_ICU_VERSION_SUFFIX));
ptr_ucol_strcoll = (Ptr_ucol_strcoll)lib.resolve("ucol_strcoll" STRINGIFY(U_ICU_VERSION_SUFFIX));
}
if (!ptr_ucol_open || !ptr_ucol_close || !ptr_ucol_strcoll) {
ptr_ucol_open = 0;
ptr_ucol_close = 0;
ptr_ucol_strcoll = 0;
qWarning("Unable to find symbols in icui18n");
status = ErrorLoading;
return false;
}
// resolve libicuuc
QLibrary ucLib(QLatin1String("icuuc"), QLatin1String(U_ICU_VERSION_SHORT));
if (!ucLib.load()) {
qWarning() << "Unable to load library icuuc" << ucLib.errorString();
status = ErrorLoading;
return false;
}
ptr_u_strToUpper = (Ptr_u_strToCase)ucLib.resolve("u_strToUpper");
ptr_u_strToLower = (Ptr_u_strToCase)ucLib.resolve("u_strToLower");
if (!ptr_u_strToUpper || !ptr_u_strToLower) {
ptr_u_strToUpper = (Ptr_u_strToCase)ucLib.resolve("u_strToUpper" STRINGIFY(U_ICU_VERSION_SUFFIX));
ptr_u_strToLower = (Ptr_u_strToCase)ucLib.resolve("u_strToLower" STRINGIFY(U_ICU_VERSION_SUFFIX));
}
if (!ptr_u_strToUpper || !ptr_u_strToLower) {
ptr_u_strToUpper = 0;
ptr_u_strToLower = 0;
qWarning("Unable to find symbols in icuuc");
status = ErrorLoading;
return false;
}
// success :)
status = Loaded;
}
if (icuCollator) {
ptr_ucol_close(icuCollator);
icuCollator = 0;
}
UErrorCode icuStatus = U_ZERO_ERROR;
icuCollator = ptr_ucol_open(localeString.toLatin1().constData(), &icuStatus);
if (!icuCollator) {
qWarning("Unable to open locale %s in ICU, error code %d", qPrintable(localeString), icuStatus);
return false;
}
return true;
}
bool qt_ucol_strcoll(const QChar *source, int sourceLength, const QChar *target, int targetLength, int *result)
{
Q_ASSERT(result);
Q_ASSERT(source);
Q_ASSERT(target);
if (!icuCollator)
return false;
*result = ptr_ucol_strcoll(icuCollator, reinterpret_cast<const UChar *>(source), int32_t(sourceLength),
reinterpret_cast<const UChar *>(target), int32_t(targetLength));
return true;
}
// caseFunc can either be u_strToUpper or u_strToLower
static bool qt_u_strToCase(const QString &str, QString *out, const QLocale &locale, Ptr_u_strToCase caseFunc)
{
Q_ASSERT(out);
if (!icuCollator)
return false;
QString result(str.size(), Qt::Uninitialized);
UErrorCode status = U_ZERO_ERROR;
int32_t size = caseFunc(reinterpret_cast<UChar *>(result.data()), result.size(),
reinterpret_cast<const UChar *>(str.constData()), str.size(),
locale.bcp47Name().toLatin1().constData(), &status);
if (U_FAILURE(status))
return false;
if (size < result.size()) {
result.resize(size);
} else if (size > result.size()) {
// the resulting string is larger than our source string
result.resize(size);
status = U_ZERO_ERROR;
size = caseFunc(reinterpret_cast<UChar *>(result.data()), result.size(),
reinterpret_cast<const UChar *>(str.constData()), str.size(),
locale.bcp47Name().toLatin1().constData(), &status);
if (U_FAILURE(status))
return false;
// if the sizes don't match now, we give up.
if (size != result.size())
return false;
}
*out = result;
return true;
}
bool qt_u_strToUpper(const QString &str, QString *out, const QLocale &locale)
{
return qt_u_strToCase(str, out, locale, ptr_u_strToUpper);
}
bool qt_u_strToLower(const QString &str, QString *out, const QLocale &locale)
{
return qt_u_strToCase(str, out, locale, ptr_u_strToLower);
}
QT_END_NAMESPACE
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